Interfaces
48
130000761_002_A0 - 08/2008 - © Oerlikon Leybold Vacuum
3.3.6 Warning codes for parameter 227
P227,
Bit
Designation
Meaning
Possible cause
Remedy
0
Motor temperature
warning
The motor tempera-
ture has passed the
warning threshold
Forevacuum pressure too high.
Gas flow too high
Fan defective
Water cooling switched off
Check the ultimate pressure of the
backing pump and install a bigger
backing pump if req.
Seal leak, check process
Replace fan
Switch on water cooling
1
Converter tempera-
ture warning
Overtemperature at
the power output
stage or within the fre-
quency converter
Ambient temperature too high
Poor cooling
Ensure max. ambient temperature of
45°C
Improve cooling
2
not used
3
Motor under-
temperature warning
The minimum permis-
sible motor temperatu-
re (warning threshold)
is not reached.
Ambient temperature too low
Pump cooling too high
Ensure min. ambient temperature of
0°C
Reduce water cooling
4, 5
not used
6
Overspeed warning
7, 8, 9,
10
not used
11
Overload warning
The pump speed has
dropped under the
normal operation
threshold
Forevacuum pressure too high.
Gas flow too high
Check the ultimate pressure of the
backing pump and install a bigger
backing pump if req.
Seal leak, check process
12, 13
not used
14
Power supply
voltage warning
Supply voltage failure
during active operation
of the pump
P4 > Umax or P4 <
Umin
Intermediate circuit voltage too
low or maximum time for gene-
rator operation was exceeded.
DC power supply voltage
below 24V
Mains voltage failure
15
Fan voltage has
failed
